RFR: 8374905: Clarify ZonedDateTime#toString() documentation regarding omitted zero seconds

[Naoto Sato]

On Fri, 9 Jan 2026 20:48:39 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> Clarifying the javadoc for `ZonedDateTime#toString()` about the zero seconds/nanoseconds omission. A corresponding CSR has also been drafted.

Thanks for the reviews!

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PR Comment: https://git.openjdk.org/jdk/pull/29146#issuecomment-3775299752